1
Glance Bernard, Schneider Martin Victor: Mode suppressor for strip transmission lines. Bell Telephone Laboratories Incorporated, Hurewitz David L, January 28, 1975: US3863181 (93 worldwide citation)

If strip transmission lines are enclosed in a conducting shield, the shield acts as a waveguide and spurious waveguide modes, which interfere with stripline transmission, are excited. A waveguide mode suppressing structure is disclosed which selectively suppresses the waveguide modes over a certain ...


2
Glance Bernard, Kaminow Ivan P: Laser control arrangement for tuning a laser.. At & T, September 13, 1995: EP0671792-A1 (15 worldwide citation)

In a laser control arrangement for tuning a laser a portion of the optical signal exiting a resonator is directed to the input of an optical frequency routing device. The routing device has a plurality of outputs each for receiving one of the frequencies supplied by the laser. Each output is coupled ...


3
Glance Bernard: Optical communication system with a stabilized group of frequencies.. American Telephone & Telegraph, January 11, 1989: EP0298598-A2 (15 worldwide citation)

An optical communication system is disclosed in which a group, or comb, of intelligence-bearing optical signals are frequency-division-multiplexed and stabilized using a corresponding comb of resonances associated with a Fabry-Perot cavity (101). In one type of application, suitable for a system in ...


4
Glance Bernard: Tunable add/drop optical filter providing arbitrary channel arrangements. At & T, July 3, 1996: EP0720408-A2 (13 worldwide citation)

A novel add/drop optical filter providing arbitrary channel arrangements between two input WDM signals and two output WDM signals is presented. The device consists of two WGR's connected by 2x2 optical switches in each WGR branch. The same circuit can also be used as a 2x2 wavelength-space switch fo ...


5
Glance Bernard, Wilson Robert Woodrow: Rapidly tunable integrated optical filter.. At & T, August 24, 1994: EP0612165-A1 (8 worldwide citation)

A monolithically integrated optical filter which is rapidly tunable over a wide optical frequency range comprises an input frequency router connected to an output frequency router by means of switchable gates. The input frequency router is a wavelength selective 1xN waveguide grating coupler and the ...


6
Glance Bernard, Wilson Robert Woodrow: A controllable optical delay line.. At & T, October 5, 1994: EP0618747-A2 (7 worldwide citation)

A variable optical delay line which can delay an optical signal by a selected interval of time comprises an input wavelength router (12) connected to an output wavelength router (22) by means of optical waveguides (18l-18N) of different lengths. A wavelength shifter (13) coupled to the input of the ...


7
Doerr Christopher Richard, Kaminow Ivan P, Glance Bernard: Optically restorable wdm ring network using simple add/drop circuitry. At & T, March 19, 1997: EP0763909-A2 (7 worldwide citation)

A parallel ring network is restorable upon sensing a failure of a transmission media. A central transmitter is coupled to one end of a first transmission medium. A central receiver is coupled to one end of a second transmission medium. A central sensing means senses a transmission media failure cent ...


8
Glance Bernard: Polarization independent coherent optical heterodyne receivers.. American Telephone & Telegraph, December 2, 1987: EP0247738-A2 (6 worldwide citation)

The present invention relates to coherent optical heterodyning receivers which mix a received optical signal (ES), including an arbitrary polarization state, and a local oscillator signal (EL), including a fixed polarization state, while providing a performance which is independent of the polarizati ...


9
Glance Bernard: Optical heterodyne mixers providing image-frequency rejection.. American Telephone & Telegraph, November 11, 1987: EP0245026-A2 (6 worldwide citation)

The present invention relates to an optical heterodyne mixer providing image-frequency rejection which (a) detects a desired signal at frequency INTEGRAL L.O. +/- INTEGRAL IF while rejecting interference from any signal at the image frequency INTEGRAL L.O. +/- INTEGRAL IF, and (b) provides performan ...


10
Glance Bernard: Fast tunable channel dropping filter.. At & T, May 31, 1995: EP0655874-A2 (6 worldwide citation)

A channel dropping filter includes three frequency routing devices (30,31,32), one which functions as an input device (30) and two which function as output devices (31,32). The first frequency routing device has one input (16) for receiving the input signal and at least N outputs, where N correspond ...